Improvement in the manufacture of glucose



snares mm oration WILLIAM GAR'ION, OF SOUTHAMPTON, ENGLAND.

IMPROVEMENT IN THE MANUFACTURE OF GLUCOSE.

Specification forming part of Letters Patent No. 166,090, dated July 27,1875; application filed June 30, 1875.

To all whom it may concern:

Be it known that I, WILLIAM GARToN, of Southampton, England, brewer,have invented or discovered certain new and useful Improvements in theManufacture of Sugar for Brewing and other purposes; and I do herebydeclare that the following is a full, clear, and exact descriptionthereof-that is to say My invention has reference to the manufacture ofsugar composed partly of dextroglucose, obtained from rice or otheramylaceous like sugar-producing substances or their products.

Dextro-glucose and lavo-glucose are two separate and distinctmanufactures; but for the purposes of brewing it has been foundbeneficial to mix some of the dextro-glucose, obtained as aforesaid fromamylaoeous substances, with laevo-glucose obtained from cane or beet.

In converting amylaceous substances into dextro-glucose by means of anacid and heat in the ordinary way, such conversion ceases as soon as thesolution has attained a specific gravity of from 1.070 to 1.080, anyfurther quantity of the amylaoeous substance which is added after thislimit has been reached simply remaining in the form of starch. It has,therefore, been usual to nontralize the solution with chalk or othersuitable material as soon as the conversion can be no longer carried on,and in consequence of the very low specific gravity great expense infuel has been necessary for evaporating the water in the subsequentprocess of conccntration. On the other hand, in treating cane, beet, orsuch like crystallized sugar, so as to obtain lzevo-glucose, aninversion may be effected in solutions of specific gravities of even1.200 to 1.275.

Now, the object of my invention is to effect economy in the manufactureof this combined article, by the processes as hereinafter described,whereby the acid usually employed in converting the amylaceoussubstances is saved, as well as a considerable amount of the fuelrequired for heating the solutions to the necessary temperatures, andfor their concentration; and I am also able to effect substances, andpartly of lwvo glucose, obtained from cane, beet, or other 1 thesolution the admixture of the dextro-glucose and the laevo-glucose inthe process of conversion, and to neutralize the acid employed for bothat one operation.

For this purpose I place the rice or amylaceous substance in a suitablevessel, previously charged with boiling acid-water, and keep adding morerice and more acid until the mixture has reached the point of about1.075, and I maintain the heat so long as any traces of starch can bedetected-4. 0., until the conversion of the solution is complete; then,instead of neutralizing the mixture in the usual way atthis stage, Itake advantage of the fact which I have ascertained by experiment, viz.,that the acid employed in converting is further capable of invertinglarge proportions of crystallized sugar, while the glucose obtained fromthe rice still remains in or beet sugar to increase the gravity of the'solution to about 1.275, and when the inverrately. I also dispense withthe chalk or lime usually required for neutralizing the dextroglucose,and further save the large quantity of fuel that would have beennecessary for concentrating the solution of dextro-glucose from 1.075 to1.275 had it been manufactured separately.

By the means hereinbefore described I obtain an article composed ofabout twenty per cent. of dextro and eighty per cent. of lmvosugar,(which proportions may, however, be varied according to requirement,)specially adapted for brewing, and which may also be employed for wineand vinegar making, and for other purposes.

What I claim, and desire to secure by Letters Patent, is-- I thereforeadd sufficient cane The process of manufacting glucose from GARTON, havehereunto set my hand this starch and cane-sugar by heating alnylaeeouseleventh day of June, one thousand eight or starchy substances with acidin the ordihundred and seventy-five.

nary manner, and adding to the mixture cane WILLIAM GARTON. or beetsugar before neutralizing the acid, Witnesses: substantially asdescribed. F. C. HILL,

In witness whereof I, the said WILLIAM JNO. L. BARON.

